docs: def run_server(conn, command, sock_path, debug, timeout):
      """Common code for run_agent and run_git below."""
      ret = 0
      try:
          handler = protocol.Handler(conn=conn, debug=debug)
          with serve(handler=handler, sock_path=sock_path,
                     timeout=timeout) as env:
              if command:
                  ret = server.run_process(command=command, environ=env)
              else:
                  signal.pause()  # wait for signal (e.g. SIGINT)
      except KeyboardInterrupt:
          log.info('server stopped')
      return ret